Spy Video: Audi RS5 Caught Undisguised at Nurburgring

The Audi RS5 is heard roaring around the Nürburgring during a high speed track testing session. Expected in 2010, the RS5 will use a 4.2-litre twin turbo V8 engine for its 450hp.

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Spy Video: Audi RS5 Caught Undisguised at Nurburgring